I'm just an amateur with making pages, this is my 'hobby' but I want to be a professional in the future. My actual project is: Doragon no tamashii (fantasy, adventure, romance, and funny). For example a page like this:
take me almost a day to finish. There isn't background on it, so it is way more easier then other pages. Movements don't take as much time to draw than detailed BGs. (for me)
Colouring and BG with a lot details are harder to finish, but it is important for covers, so I swallow my lazyness.
A well drawn cover take me at least 4 days.
People rally like details and dynamic drawings, so all minutes of work worth it
Good luck with your comic in the future! ^v ^
P.s.: sorry if manga style doesn't interest you... xD